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Finding the Fourth Proportional to 93,861.60, 129,529.44 and 51,420

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Solution

The fourth proportional to 93,861.60, 129,529.44 and 51,420 is: 70,959.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,861.60 : 129,529.44 = 51,420 : x
  2. Step 2: Convert to fraction form
    93,861.60/129,529.44 = 51,420/x
  3. Step 3: Cross multiply
    93,861.60x = 129,529.44 × 51,420
  4. Step 4: Simplify right side
    93,861.60x = 6,660,403,804.80
  5. Step 5: Solve for x
    x = 6,660,403,804.80/93,861.60
  6. Step 6: Final answer
    x = 70,959.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.